gdb: defer commit resume until all available events are consumed

[deliverable/binutils-gdb.git] / gdb / ia64-linux-tdep.c

diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
index d1eb529cd4f239d4b2255889db9bb8356ce53850..33684ceb90e231b994dff2f21b5d4ff29f0391ff 100644 (file)
--- a/gdb/ia64-linux-tdep.c
+++ b/gdb/ia64-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
 
-   Copyright (C) 2000-2013 Free Software Foundation, Inc.
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -26,6 +26,7 @@
 #include "solib-svr4.h"
 #include "symtab.h"
 #include "linux-tdep.h"
+#include "regset.h"
 
 #include <ctype.h>
 
@@ -131,10 +132,96 @@ ia64_linux_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
          || isdigit (*s));  /* Literal number.  */
 }
 
+/* Core file support. */
+
+static const struct regcache_map_entry ia64_linux_gregmap[] =
+  {
+    { 32, IA64_GR0_REGNUM, 8 },        /* r0 ... r31 */
+    { 1, REGCACHE_MAP_SKIP, 8 }, /* FIXME: NAT collection bits? */
+    { 1, IA64_PR_REGNUM, 8 },
+    { 8, IA64_BR0_REGNUM, 8 }, /* b0 ... b7 */
+    { 1, IA64_IP_REGNUM, 8 },
+    { 1, IA64_CFM_REGNUM, 8 },
+    { 1, IA64_PSR_REGNUM, 8 },
+    { 1, IA64_RSC_REGNUM, 8 },
+    { 1, IA64_BSP_REGNUM, 8 },
+    { 1, IA64_BSPSTORE_REGNUM, 8 },
+    { 1, IA64_RNAT_REGNUM, 8 },
+    { 1, IA64_CCV_REGNUM, 8 },
+    { 1, IA64_UNAT_REGNUM, 8 },
+    { 1, IA64_FPSR_REGNUM, 8 },
+    { 1, IA64_PFS_REGNUM, 8 },
+    { 1, IA64_LC_REGNUM, 8 },
+    { 1, IA64_EC_REGNUM, 8 },
+    { 0 }
+  };
+
+/* Size of 'gregset_t', as defined by the Linux kernel.  Note that
+   this is more than actually mapped in the regmap above.  */
+
+#define IA64_LINUX_GREGS_SIZE (128 * 8)
+
+static const struct regcache_map_entry ia64_linux_fpregmap[] =
+  {
+    { 128, IA64_FR0_REGNUM, 16 }, /* f0 ... f127 */
+    { 0 }
+  };
+
+#define IA64_LINUX_FPREGS_SIZE (128 * 16)
+
+static void
+ia64_linux_supply_fpregset (const struct regset *regset,
+                           struct regcache *regcache,
+                           int regnum, const void *regs, size_t len)
+{
+  const gdb_byte f_zero[16] = { 0 };
+  const gdb_byte f_one[16] =
+    { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
+
+  regcache_supply_regset (regset, regcache, regnum, regs, len);
+
+  /* Kernel generated cores have fr1==0 instead of 1.0.  Older GDBs
+     did the same.  So ignore whatever might be recorded in fpregset_t
+     for fr0/fr1 and always supply their expected values.  */
+  if (regnum == -1 || regnum == IA64_FR0_REGNUM)
+    regcache->raw_supply (IA64_FR0_REGNUM, f_zero);
+  if (regnum == -1 || regnum == IA64_FR1_REGNUM)
+    regcache->raw_supply (IA64_FR1_REGNUM, f_one);
+}
+
+static const struct regset ia64_linux_gregset =
+  {
+    ia64_linux_gregmap,
+    regcache_supply_regset, regcache_collect_regset
+  };
+
+static const struct regset ia64_linux_fpregset =
+  {
+    ia64_linux_fpregmap,
+    ia64_linux_supply_fpregset, regcache_collect_regset
+  };
+
+static void
+ia64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+                                        iterate_over_regset_sections_cb *cb,
+                                        void *cb_data,
+                                        const struct regcache *regcache)
+{
+  cb (".reg", IA64_LINUX_GREGS_SIZE, IA64_LINUX_GREGS_SIZE, &ia64_linux_gregset,
+      NULL, cb_data);
+  cb (".reg2", IA64_LINUX_FPREGS_SIZE, IA64_LINUX_FPREGS_SIZE,
+      &ia64_linux_fpregset, NULL, cb_data);
+}
+
 static void
 ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+  static const char *const stap_register_prefixes[] = { "r", NULL };
+  static const char *const stap_register_indirection_prefixes[] = { "[",
+                                                                   NULL };
+  static const char *const stap_register_indirection_suffixes[] = { "]",
+                                                                   NULL };
 
   linux_init_abi (info, gdbarch);
 
@@ -156,20 +243,24 @@ ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
                                              svr4_fetch_objfile_link_map);
 
+  /* Core file support. */
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, ia64_linux_iterate_over_regset_sections);
+
   /* SystemTap related.  */
-  set_gdbarch_stap_register_prefix (gdbarch, "r");
-  set_gdbarch_stap_register_indirection_prefix (gdbarch, "[");
-  set_gdbarch_stap_register_indirection_suffix (gdbarch, "]");
+  set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
+  set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+                                         stap_register_indirection_prefixes);
+  set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+                                           stap_register_indirection_suffixes);
   set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
   set_gdbarch_stap_is_single_operand (gdbarch,
                                      ia64_linux_stap_is_single_operand);
 }
 
-/* Provide a prototype to silence -Wmissing-prototypes.  */
-extern initialize_file_ftype _initialize_ia64_linux_tdep;
-
+void _initialize_ia64_linux_tdep ();
 void
-_initialize_ia64_linux_tdep (void)
+_initialize_ia64_linux_tdep ()
 {
   gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_LINUX,
                          ia64_linux_init_abi);